Add new getInteractionObject() function to questionModel.js

[brian-learningpool]

In readiness to support xAPI I'm proposing that a getInteractionObject() is added to QuestionView.js, and implemented in question components the same way as getResponse and getResponseType() currently are.

The purpose of this function is to return an object containing the extra properties which could be appended to an xAPI object.definition object. For example, a choice interaction could return:

{
  choices: [],
  correctResponsesPattern: []
}

[oliverfoster]

Please put it on the model. I'll plumb it in to make it backwards compatible for components without models. We really need to move getResponse and getResponseType also

[brian-learningpool]

Sure thing. 👍

[oliverfoster]

Is this waiting on me? @brian-learningpool

[moloko]

can I close this now that this has been added to the framework? I know we're still waiting on reviews and merges for the changes to the various question components but I think those can be done as and when and shouldn't hold up the v3 framework release

[brian-learningpool]

@moloko, this is ok to close. It would be good to get some eyes on the associated plugin PRs (listed here: #1713) though.